CN103578492B - Information recording method, information record carrier, information recording carrier and medium evaluation method - Google Patents

Abstract

A kind of information recording method, information record carrier, information recording carrier and medium evaluation method.Record signal deterioration on CD, its degradation characteristic changes according to the wave recording for record.Additionally, the wave recording for the record of CD needs not only to consider that the signal quality after just recording is adjusted, in addition it is also necessary to consider that deterioration is adjusted.Focus on the situation that in the deterioration of tracer signal, the fluctuation of labelling marginal position increases, adjust wave recording according to the undulate quantity of marker edge position.Specifically, minimum by undulate quantity or adjust wave recording in the way of reaching below threshold value.Additionally, utilize this wave recording, in light disc recording information.Further it is provided that storage has record medium or the information record carrier of the parameter of this wave recording.

Description

Information recording method, information record carrier, information recording carrier and medium evaluation method

Technical field

The present invention relates to information recording method, for the information record carrier of optical information recording medium record information, letter Breath record medium and medium evaluation method, this information recording method determines for by irradiating when light records information to CD The wave recording of light beam, and utilize this light beam to record information.

Background technology

At present, as the CD of optical information recording medium, CD (compact Disc), DVD (Digital Versatile Disc)、BD(Blu-ray Disc)、BDXL^TMDeng commercialization, it is widely used.These CDs have read-only i.e. ROM (Read Only Memory) type, recordable type i.e. R (Recordable) type, rewritable i.e. RE (Rewritable) type etc. are each Type.

The record of the information in CD reproduces by carrying out to CD irradiating laser.The heat utilizing laser is formed The region that the state of recording film material changes, thus records information.The region that this state changes is referred to as labelling, state The region not changed is referred to as space (space).As recording film, use based on phase-change material, organic pigment, inorganic material The alloy of material, oxide etc..At CD, DVD, BD, BDXL^TMIn, use marker edge record as coded system, information is as mark Note marginal position and be recorded.

In record, in order to form the labelling of random length on recording film, need to control to be produced by the irradiation of laser Raw heat.Therefore, according to the mark lengths formed, laser during record is controlled with various waveforms.Fig. 1 (A) (B) is to be formed One example of the lasing fluorescence waveform used during the labelling of 2T～5T (T is channel bit length).They are at BDXL^TMStandard makes Wave recording, Fig. 1 (A) be referred to as N-1 strategy, Fig. 1 (B) is referred to as castle strategy (castle strategy).At N-1 In strategy, with the labelling of (N-1) individual pulse recording NT length.Initial pulse in train of pulse is referred to as the first pulse, last Pulse is referred to as final pulse.Pulse between first pulse and final pulse is referred to as multiple-pulse, is 1 in the case of 4T labelling Pulse, afterwards, mark lengths often increases 1T, is increased by a pulse.The pulse of 2T labelling only has the first pulse；The arteries and veins of 3T labelling Punching only the first pulse and final pulse, the most do not include multiple-pulse.On the other hand, in castle strategy, there is not multiple-pulse, main Want only to be made up of the first pulse and final pulse, between the first pulse and final pulse, become the waveform kept with certain power. This waveform does not use the pulse of shorter width, is therefore suitable for high-speed record.

In the laser power of each strategy, under N-1 strategy, use recording power (Pw), spatial power (Ps), biasing merit Rate (PBW), cooling power (Pc) these 4 kinds, in castle strategy, also use middle power (Pm) in addition to Pw, Ps, Pc, altogether Use these 4 kinds.Here, about RE type CD, Ps is referred to as wiping power (Pe).Pw is maximal power level in train of pulse, main It is used for putting into energy to cause state to change to recording film.Ps is the power level to the partial illumination becoming space, mainly Use the preheating for forming next labelling.Pe in RE type CD except for preheating in addition to, also act as make the most recorded Labelling replys the effect for space.Pc is and then power level after final pulse, in R type CD, primarily serves and cuts Disconnected heat, to the effect of succeeding marker record portion diffusion, in RE type CD, primarily serves and cools down rapidly note to form labelling The effect of record film.

Video disc recording uses above-mentioned wave recording to carry out.Wave recording is according to kind, the recording layer of CD and not With.This is because, the difference such as the material of recording film, labelling formation basic theory.Therefore, wave recording is for each of CD Class, recording layer prepare.As the index for definition record waveform, except above-mentioned various power levels Pw, Pm, Ps, Pe, Outside Pc, PBW, there is also dTtop, Ttop, TMP, dTLP, TLP, dTc, dTS, the dTE for defining pulse width etc.. DTtop is the position, top of the first pulse, and Ttop is the time width of the first pulse, and TMP is multipulse time width, dTLP Being the position, top of final pulse, TLP is the time width of final pulse, and dTS is the starting position of Ps, and dTE is the beginning of Pe Position.According to BD standard, the setting of these parameters is to carry out with 1/16 unit of channel bit, and according to BDXL^TMStandard, Then make to carry out with 1/32 unit of channel bit.

Each CD, recording layer wave recording prepare mainly to be implemented by disc manufacturer, determined by marking wave Shape is converted into the index of above-mentioned wave recording recorded the management region of CD.Thus, using as optical information recording again When the driver of existing device records on CD, driver obtains the wave recording of this CD from the management information of CD, It is possible to start record in the case of uncomfortable complete record waveform.Even here, CD of the same race, due to manufacturing deviation, also There is the situation different by the wave recording particularly laser power level that each CD is optimal.Even if additionally, using same light In the case of dish, due to the individual diversity of driver, at identical wave recording, particularly under the power level of same laser, There is also the situation that cannot be carried out optimal record.In order to tackle the individual diversity of this CD, driver, in the drive, tool It is ready for use on the device adjusting wave recording.As a kind in method of adjustment, there is referred to as OPC (Optimum Power Control) Method, in the method, be substantially carried out the power level optimization of laser.Thereby, it is possible to not by CD, driver In the case of the impact of body difference, it is achieved suitable record.

The adjustment of the wave recording in above-mentioned disc manufacturer, driver is by the tracer signal in each wave recording Quality be evaluated carrying out.As the evaluation index of tracer signal, the timeliness for evaluation mark edge is had to fluctuate Shake (Jitter), for evaluating bER (bit Error Rate), the SER (Symbol of decoded result of reproducing signal Error Rate) etc..Additionally, as according at BDLX^TMReproducing signal process in use PRML mode evaluate reproduction letter The index of number quality, in patent documentation 1, discloses i-MLSE (Integrated-Maximum Likelihood Sequence Error Estimation).I-MLSE is for the target waveform predicted when decoding and reproduced-signal waveform The margin of error carry out the index of statistical appraisal.In addition, Patent Document 2 discloses SbER (Simulated bit Error Rate).SbER is for the presumption to error probability of happening of the margin of error according to target waveform and reproduced-signal waveform Value carries out the index of quantification.Further, Patent Document 3 discloses the deviation of marginal position for evaluating recording mark Index i.e. L-SEAT (run-length-Limited Sequence Error for Adaptive Target).L-SEAT is Edge is relative to that suppose during skew about target waveform, by each Left that front and back edge calculates of each mark lengths The value of the margin of error of target waveform, Right target waveform and reproduced-signal waveform.Due to can evaluation mark edge Side-play amount, so recommending L-SEAT as BDXL^TMThe adjustment index of the wave recording in standard.

Patent documentation 1:WO2010-001588

Patent documentation 2: Japanese Unexamined Patent Publication 2004-253114 publication

Patent documentation 3:US2010/0260025 publication

Patent documentation 4: Japanese Unexamined Patent Publication 2004-200868 publication

Here, the signal that record is on CD deteriorates in time.Therefore, need in an optical disc to adjust wave recording, To suppress the deterioration of tracer signal.In order to confirm the difference of the Signal Degrade characteristic caused by wave recording, at BDXL^TMStandard In CD, 2 kinds of wave recordings that the i-MLSE after firm record is same degree are made.Wave recording is with the city of Fig. 1 (B) Make based on the strategy of fort, their parameter value is shown in Fig. 2 (a) (b).Wave recording A (Write strategy-A:WS- A) it is mainly modulation degree with wave recording B (WS-B) different, is 50% and 60% respectively.To the letter utilizing these wave recording records Number enforcement temperature chamber accelerated test the result determining degradation characteristic are Fig. 3.Temperature chamber accelerated test is the most again The test method of existing deterioration, is keeping CD in the environment of temperature, humidity ratio actual service conditions height, promotes recording film The method that the chemical change of material, the mechanicalness of substrate change.As can be seen from Figure 3, the i-MLSE after just recording is at 2 marking waves Shape is same degree, but compared with wave recording B, the degradation speed of wave recording A is very fast.Accordingly, it is known that setting just note I-MLSE after record is during the wave recording of index adjusts, it is impossible to determine the marking wave of deterioration for suppressing tracer signal Shape.This is because, i-MLSE is not the index of the degradation characteristic reflecting signal.Due to L-SEAT, SbER, bER, SER, The indexs such as Jitter are not the index of reflection degradation characteristic, it is apparent that by note based on the quality after these just record Record waveform adjusts the wave recording that cannot determine the deterioration for suppressing tracer signal.Above, existing wave recording is being used Adjustment index in the case of, it is difficult to determine the wave recording of deterioration for suppressing tracer signal.

Summary of the invention

Therefore, the situation that in the deterioration of tracer signal, the fluctuation of labelling marginal position increases is paid close attention to, according to labelling limit The undulate quantity of edge position adjusts wave recording.Specifically, wave recording is adjusted to, undulate quantity minimum or reach threshold value with Under.

Below, the index of the degradation characteristic of reaction CD is illustrated.

In order to understand the main cause of CD deterioration, implement temperature chamber accelerated test, and measured adjoint deterioration product Raw recording mark size, the movement (skew) of mean place of marker edge, the change of fluctuation of marker edge position.Its knot Fruit is shown in Fig. 4.β in Fig. 4 is the index of the ratio of the mark lengths evaluating short labelling and long labelling.Additionally, L-SEAT skew and L-SEAT shake is the index disclosed in patent documentation 3, is skew and the index of fluctuation of evaluation mark marginal position.? This, L-SEAT is the index directly calculated according to reproducing signal, it is therefore desirable to notice that it is affected by the influence of noise of playback system The situation of index.If the increments Δ of each evaluation index before and after comparing accelerated test, then it is able to confirm that L-SEAT offsets not Changing, the increase of β is the least, and L-SEAT shake then dramatically increases.Thereby, it is possible to confirm the deterioration in tracer signal In, the undulate quantity of marker edge position increases.

Therefore, the fluctuation of the marker edge position impact on reproducing signal quality by simulation study.In order to compare Relatively, in all mark lengths, situation about increasing the length of labelling simultaneously is also carried out calculating.The increase simultaneously of mark lengths is right Short labelling brings change with the ratio of the mark lengths of long labelling, is therefore equivalent to change β.Calculate the undulate quantity of marker edge position Being shown in Fig. 5 (A) with the result of the relation of i-MLSE, the result calculating the increments of mark lengths and the relation of i-MLSE is shown in figure 5(B).Along with the increase of the undulate quantity of marker edge position, i-MLSE sharply increases, therefore, it is possible to confirmation flag marginal position Fluctuation makes signal quality significantly deteriorate (Fig. 5 (A)).On the other hand, relative to the increase of mark lengths, i-MLSE does not occurs Change, it can thus be appreciated that β change is for the contribution little (Fig. 5 (B)) of signal quality deterioration.According to result above, learn tracer signal The deterioration main cause of quality is the increase of the fluctuation of marker edge position.It will be apparent from the above that, by wave recording is adjusted Whole for make the undulate quantity of marker edge position reduce, it is possible to the deterioration of suppression tracer signal.

Here, as the method for the undulate quantity for evaluation mark marginal position, employ L-SEAT Jitter, but Owing to L-SEAT Jitter is by the various effect of noise of playback system etc., because of rather than correct response marker edge position The index of undulate quantity.Therefore, analyze can not by the various effect of noise of playback system etc. evaluation mark margin location The index of the undulate quantity put.Below, the evaluation index analyzed is illustrated.Fig. 6 is that the position representing marker edge is moved Time the schematic diagram of change of signal level.The change (step response) of the signal level of marker edge is generally linear, by This understands the variable quantity of signal level when marker edge position is moved and the amount of movement of marker edge position and step response Peak swing proportional.I.e., it is known that at the signal movement of marker edge position caused with the peak swing of tracer signal The value that the variable quantity of level is standardized and obtains, is not dependent on the percentage modulation playback system of reflectance, signal, represents mark The amount of movement of note marginal position.Utilize this feature, use by the fluctuation to marker edge position of the peak swing of step response The index that the undulate quantity of the signal level caused is standardized and obtains, is evaluated the undulate quantity of marker edge position. In order to confirm that analyzed evaluation index is not affected by playback system etc., the evaluation to being analyzed under multiple reproducing power refers to The result that mark is measured is shown in Fig. 7.Now, the signal measured under all reproducing power is identical.SNR with reproducing signal The situation that (Signal to Noise Ratio) changes along with the change of reproducing power independently, the evaluation index analyzed For certain value, the evaluation index that it is possible to confirm to be analyzed is not affected and correct response marker edge position by playback system Undulate quantity.

According to result above, by utilizing above-mentioned evaluation index to carry out the undulate quantity of evaluation mark marginal position, and by record Waveform is adjusted so that evaluation index reduces, it is possible to determine the wave recording of deterioration for suppressing tracer signal.

Here, the calculating of the evaluation index of the undulate quantity of marker edge position is not limited to above-mentioned.Such as, if at same medium On compare the difference of undulate quantity of marker edge position based on wave recording, then be not limited to rank for standardized signal amplitude Jump the peak swing responded, as long as the signal amplitude of same signal length in each wave recording.If additionally, in difference Mark lengths between compare the undulate quantity of marker edge position, measured as long as then calculating to be multiplied by above-mentioned evaluation index Signal length and the index that obtains.Further, the undulate quantity of the time orientation that the fluctuation of marker edge position causes is utilized In the case of the evaluation index of the undulate quantity calculating marker edge position, it is also possible to the peak swing of step response to the time The undulate quantity in direction is standardized.As it has been described above, the evaluation index of the undulate quantity of marker edge position has according to purpose respectively Plant change.Therefore, after, the index being used for the undulate quantity of evaluation mark marginal position is referred to as edge wave momentum.Ruffling Amount is by the index of the undulate quantity quantification of marker edge position, at the wave recording of the deterioration determined for suppressing tracer signal Time, refer to for judging the good no index of wave recording.Additionally, the marker edge used in calculating by edge wave momentum below The undulate quantity of the signal level that the fluctuation of position causes is referred to as level fluctuation amount, the time fluctuation of marker edge position caused The undulate quantity in direction is referred to as Time Wave momentum.

Invention effect

The method adjusting wave recording by edge wave momentum based on the present invention, it is possible to determine for suppressing tracer signal The wave recording of deterioration, it is possible to realize the long lifetime of tracer signal.

Accompanying drawing explanation

Fig. 1 is to illustrate the wave recording in (A) N-1 strategy, (B) castle strategy and for determining the index of wave recording The figure of one example of definition.

Fig. 2 is to illustrate for determining based on castle strategy (a) wave recording A and the waveform configuration of (b) wave recording B The figure of one example of desired value.

Fig. 3 is to measure i-based on temperature chamber accelerated test under the tracer signal being shown in wave recording A and wave recording B The figure of one example of the result of the change of MLSE.

Fig. 4 is to measure L-SEAT jitter, β, L-SEAT shift based on temperature chamber accelerated test shake, L-SEAT Skew, the figure of an example of result of change of β.

Fig. 5 is to illustrate the undulate quantity of calculating (A) marker edge position, the increments of (B) mark lengths and the pass of i-MLSE The figure of one example of the result of system.

Fig. 6 is the schematic diagram of the relation of the fluctuation of the fluctuation of flag activation marginal value and signal level.

Fig. 7 is evaluation index and the relation of the reproducing power of use in mensuration of the undulate quantity of flag activation marginal position The figure of one example.

Fig. 8 is the block diagram of an example of the major part structure of the optical disc apparatus illustrating that embodiments of the invention relate to.

Fig. 9 is the frame of an example of the major part structure in the control portion of the optical disc apparatus illustrating that embodiments of the invention relate to Figure.

Figure 10 is an example of the result of the edge wave momentum illustrating the tracer signal measuring wave recording A, B, C, D, E, F Figure.

Figure 11 is the one of the finger target value illustrating the waveform configuration for determining (a) wave recording E and (b) wave recording F The figure of example.

Figure 12 is to measure under the tracer signal being shown in wave recording A, wave recording B, wave recording E to add based on temperature chamber The figure of one example of the result of the change of the i-MLSE of speed test.

Figure 13 is the stream of an example of the step of the method illustrating the wave recording determining the deterioration for suppressing tracer signal Cheng Tu.

Figure 14 is to be shown in have imported accelerated test for suppressing the wave recording of the deterioration of tracer signal to determine in method In the case of the flow chart of an example of step.

Figure 15 is to measure based on temperature chamber accelerated test under the tracer signal being shown in wave recording E and wave recording F The figure of one example of the result of the change of edge wave momentum.

Figure 16 is to measure based on temperature chamber accelerated test under the tracer signal being shown in wave recording E and wave recording F The figure of one example of the result of the change of i-MLSE.

Figure 17 is to be shown in BDXL^TMThe figure of an example of the relation of signal length and signal amplitude in the tracer signal of standard.

Figure 18 is to illustrate the single cycle pattern (pattern) according to (a) 8T signal and the single cycle figure of (b) 2T signal The figure of one example of the overlapped signal that the reproducing signal of case generates.

Figure 19 is to measure the L-SEAT based on reproducing acceleration by light test under the tracer signal being shown in wave recording C The figure of one example of the result of the change of jitter, β.

Figure 20 is to illustrate to measure SNR and the edge wave momentum changing the signal that recording power records in wave recording E The figure of an example of result.

Figure 21 is to measure based on temperature chamber accelerated test under the tracer signal being shown in wave recording E and wave recording E ' The figure of one example of the result of the change of i-MLSE.

Figure 22 is the figure of an example of the structure illustrating the CD relating to embodiments of the invention.

Figure 23 is the information comprised in the DI (Disc Information) of the CD illustrating that embodiments of the invention relate to The figure of an example.

Figure 24 is the figure of an example of the edge wave momentum of the tracer signal illustrating CD 1～10 and the result of calculation in life-span.

Reference

10: CD

12: spindle drive motor

14: light pickup section

16: laser

18: encoder

20:LD drive division

22: control portion

24:RF signal processing part

26: decoder

28:Henv and Lenv obtaining section

100: CD

101: user data area

102: management region

103:DI (Disc Information)

104: defect management information

105: region is write in examination

Detailed description of the invention

Below, as embodiments of the invention, utilize accompanying drawing that the determination method of wave recording is illustrated.

[embodiment 1]

Before the determination method of explanation wave recording, first the optical disc apparatus involved by the present embodiment is illustrated. Fig. 8 illustrates the structure of the optical disc apparatus used in an embodiment of the present invention.As the major part structure of optical disc apparatus, tool Standby: spindle drive motor 12, light pickup section 14, encoder 18, LD drive division 20, control portion 22, RF signal processing part 24, decoder 26, Henv and Lenv obtaining section 28.Spindle drive motor 12 CLV (Constant Linear Velocity) or CAV (Constant Angular Velocity) controls CD 10.It is opposed to arrange light pickup section 14 with CD 10, by from laser The laser 16 of diode (LD) injection recording power, to CD 10 tracer signal, by the laser 16 from LD injection reproducing power, Read the signal recorded.Further, in the case of CD 10 can rewrite, (reproducing power ＜ is deleted to delete power from LD injection Except power ＜ recording power) laser 16 delete recorded signal.

When tracer signal, with encoder 18, tracer signal is encoded, it is provided that to LD drive division 20.LD drive division 20 Wave recording according to coding determines driving signal, and the LD being supplied in light pickup section 14 carrys out tracer signal.By from control The control signal in portion 22 determines the recording powers of laser beam of LD drive division 20.Control portion 22, before tracer signal, utilizes multiple record Power, the examination at CD 10 is write region and is carried out examination and write, according to described examination write signal, determines optimal recording power.Further, profit Carry out examination with multiple wave recording to write, according to described examination write signal, determine optimal wave recording.

On the other hand, when reproducing data, it is provided to RF signal processing part 24 from the RF signal of light pickup section 14 output. RF signal processing part 24 has RF amplifier, equalizer, binaryzation portion, PLL portion etc., and is supplied to after these process RF signals Decoder 26.In decoder 26, according to the RF signal by 2 values and the synchronised clock in the reproduction of PLL portion, signal is solved Code, and export as reproducing data.Henv and Lenv obtaining section 28 is amplified at the reproducing signal that will export from light pickup section 14 Afterwards, calculate top envelope (Henv) and the lower envelope line (Lenv) of reproducing signal, and as signal quality evaluation use It is supplied to control portion 22.Further, the reproduction RF signal obtaining system i.e. RF signal processing part 24 from RF signal is being also carried out After amplification, as reproducing signal evaluation with and be supplied to control portion 22.Additionally, also provide for from light pickup section to control portion 22 The RF signal of 14, for the noise parsing etc. of reproducing signal.Additionally, when data recording/reproducing, in addition there is also: generate Tracking error signal, focus error signal control the circuit of focus servo, tracking servo；And according to being formed on the optical disc 10 Fluctuation signal carry out the circuit that Address demodulation or rotating speed control, but about these, due to same as the prior art, so omitting Its explanation.

Control portion 22 is specifically made up of CPU, memorizer (ROM, RAM) etc., it is possible to realized various function by combinations thereof. Such as, have and calculate edge wave momentum according to reproducing signal, and determine the function of optimal wave recording according to edge wave momentum. Fig. 9 illustrates the functional module in the control portion 22 in Fig. 8.Control portion 22 has: noise measurement/calculating part, accelerated test process portion, Level fluctuation amount calculating part, signal evaluation portion, ruffling amount calculating part, wave recording adjustment portion/determine portion and storage part. Noise level measurement and the noise of reproducing signal are separated by noise measurement/calculating part by each composition.Accelerated test process portion has The acquirement of the Test condition such as the acquirement of accelerated test condition, accelerated test time, calculate (the reflection of various indexs according to reproducing signal The shake of rate, percentage modulation, asymmetric, β etc.) function, acquired information is stored storage part.Additionally, according to from storage part The information read, is also accelerated the judgement of the change of the beginning/end of test, accelerated test condition.Due to accelerated test bar Part is different according to each of CD 10 class (SL, DL, TL, QL etc.), linear velocity, thus these according to the kind of CD 10 and Change.Level fluctuation amount calculating part calculates the average level etc. of reproducing signal according to reproducing signal, and, utilize from storage The various noises that portion reads, calculate level fluctuation amount.Signal evaluation portion is according to reproducing signal, from the letter of RF signal processing part acquirement Breath, the quality evaluation of implementation record signal.Ruffling amount calculating part calculates the signal amplitude of reproducing signal according to reproducing signal, Further, the level fluctuation amount that utilization obtains from storage part, the signal length etc. used in the calculating of level fluctuation amount, calculate Edge wave momentum.Wave recording adjusts, determines that portion, according to the edge wave momentum obtained from storage part, carries out the adjustment of wave recording And the determination of optimal wave recording, export as power control signal, and be supplied to LD drive division 20.

Then, the method for the edge wave momentum utilizing above-mentioned optical disc apparatus to calculate tracer signal is illustrated.By surveying Determine various noises contained in reproducing signal, according to the noise calculation level fluctuation amount measured, and level fluctuation amount is carried out The computing of regulation, thus calculates edge wave momentum.As noise contained in reproducing signal, there is system noise (N_system), laser Noise (N_LD), dish noise (N_Disc), the level fluctuation amount (N caused by fluctuation of marker edge position_fluc.).Utilize control portion 22 In noise measurement/calculating part measurement and separate these various noises.

System noise be not to OEIC input light input state under optical disc apparatus electric circuit in produce make an uproar Sound.Before fixing disc, reproducing circuit is made to be in playback mode to carry out the mensuration of system noise.The system noise that will be measured Sound stores the storage part in control portion 22.

Utilize the noise (N during non-recorded part having reproduced CD_total-1), by the computing of following formula 1, calculate Laser noise and dish noise.

[formula 1]

N_LD+Disc=√(N² _total-1-N² _system) formula 1

Here, laser noise and dish noise are as aggregate value (N_LD+Disc) obtain, by acquired value and reproducing signal Average level set up and store accordingly in the storage part in control portion 22.

Then, carry out the mensuration/calculating of level fluctuation amount, but now need to utilize the wave recording record as object The signal of regulation.In the case of setting multiple wave recording in the determination of wave recording, such as, reading is previously recorded in this light Best titime waveform in dish, or read the best titime waveform in this CD being stored in optical disc apparatus, and according to this The multiple wave recording of best titime wave setting.Multiple wave recording set by utilization, at the regulation region of CD, such as light The signal that regional record specifies is write in the examination of dish.The signal of regulation is that ruffling measures surely with pattern, such as, is the list of 8T signal One periodic pattern.The signal length of single cycle pattern can be that (～10,000 T are left about thousand times of recorded signal repetitions Right), but long to about 1,000,000 T time, hits increases, therefore, it is possible to correctly measure edge wave momentum.Here, further acknowledging that this In the case of signal quality in wave recording, also tracer signal quality determination pattern such as random pattern, as regulation Signal.The signal length of random pattern depends on the index of measured signal quality, such as, if with 1 × 10^-6Precision determination BER, then need to be about 1,000,000 T, if measuring SER, then needs 1 bunch (cluster).Additionally, measuring i-MLSE, L-SEAT In the case of ,～about 100,000 T the shortest such signal length is the most permissible.

Measure surely with pattern by reproducing ruffling, carry out the mensuration/calculating of level fluctuation amount.Survey according to reproducing signal Determine noise (N_total-2), by the computing of equation 2 below, calculate level fluctuation amount.

[formula 2]

N_fluc=√(N² _total-2-N² _system-αN² _LD+Disc) formula 2

Measure surely with record part and the reflection light quantity ratio of non-recorded part of pattern here, factor alpha is ruffling.? Laser noise is because these noises with the reason being multiplied by factor alpha on the total noise of dish noise and becomes with the average reflectance of CD Ratio.Additionally, in the case of comprising the signal length of more than optical resolution in ruffling measures fixed pattern, surveyed Fixed noise comprises signal component.Now, in advance after measuring noise remove signal component, implement based on formula 2 The calculating of the level fluctuation amount of computing.As minimizing technology, such as, it is single cycle pattern that ruffling measures fixed pattern, When utilizing FFT function (Fast Fourier Transform: high speed Fourier transform) to measure noise, as long as from making an uproar of being measured Present in audio spectrum removal signal frequency, carrier wave is the most permissible.The level fluctuation amount calculated is set up with wave recording and is deposited accordingly Storage is in the storage part in control portion 22.

Utilize the level fluctuation amount calculated, calculate edge wave momentum by the computing of equation 3 below.

[formula 3]

(edge wave momentum)=(level fluctuation amount)/(amplitude of the mark lengths of regulation) formula 3

Here, according to the principle of Fig. 6, it is stipulated that the amplitude of mark lengths be step response the most good of tracer signal Width, but if in the calculating of the edge wave momentum of each wave recording, use the signal amplitude of identical signal length, even if the most not It is the peak swing of step response, it is also possible to compare edge wave momentum.Accordingly, as the amplitude of the mark lengths of regulation, such as The signal amplitude of random pattern, ruffling can be utilized to measure surely with the signal amplitude of pattern.The ruffling that will be calculated Amount and wave recording set up storage accordingly to the storage part in control portion 22.

Even if here, in the case of the undulate quantity of marker edge position is equal, the edge wave momentum calculated with formula 3 is also Measure fixed pattern according to the ruffling recorded to change.This is because the density of the marker edge in reproducing signal is sent out Changing.Measure fixed pattern additionally, will not depend on ruffling and calculate the operation method of edge wave momentum and be shown in formula 4 In.

[formula 4]

(edge wave momentum)=(level fluctuation amount) × (signal length (T))/(amplitude of regulation mark lengths) formula 4

Here, signal length is the signal length (T unit) of the signal determining level fluctuation amount, phase in above-mentioned computing When in the situation carrying out by every 1T signal converting by the edge wave momentum of formula 3.By this computing, edge in each wave recording Undulate quantity measures in the case of using pattern difference, it is also possible to edge wave momentum is compared in unification.

Utilize above-mentioned optical disc apparatus and the computational methods of edge wave momentum, actually implement the deterioration of suppression tracer signal The determination of wave recording.In the present embodiment, as CD 10, the CD used in fig. 2 is used, at BDXL^TMStandard Under conditions of carry out the adjustment of wave recording.As wave recording, prepare 6 of wave recording A, B, C, D, E, F.These are main The modulation degree being tracer signal is different, is the record adjusted on the basis of the wave recording A of this CD kept by optical disc apparatus Waveform.It is to write region in the examination of CD to carry out that the examination utilizing each wave recording to carry out is write.In examination is write, the signal of record is letter The random pattern of number quality determination and ruffling measure the single cycle pattern of the 8T signal determined.The meter of edge wave momentum Carry out according to formula 3 at last, in equation 3, use the signal amplitude of 8T signal, as the standardized " mark of regulation The amplitude of note length ".The result measuring edge wave momentum in each wave recording is shown in Figure 10.Along be changed to wave recording A, B, C, D, it is possible to find that edge wave momentum reduces, but in wave recording D and wave recording F, do not have in edge wave momentum Find change.Additionally, the best titime waveform in this CD is defined as wave recording E.By wave recording E and wave recording F Parameter value be shown in Figure 11 (a) (b).In order to be confirmed whether to inhibit with determined by wave recording record signal through time bad Change, as Fig. 3, wave recording E is implemented temperature chamber accelerated test.In order to compare degradation characteristic, also show figure at Figure 12 The result of wave recording A, B of 2.Here, owing to the temperature of the accelerated test in this accelerated test is set as the situation than Fig. 3 Height, therefore can reproduce the deterioration of tracer signal at short notice.The degradation speed of the tracer signal of wave recording E compares wave recording The tracer signal of B is slow, it may thus be appreciated that the record of suppression deterioration suitably can be determined by the determination method of this wave recording Waveform.The result utilizing this accelerated test calculates the life-span (i-under standard maintaining requirement (25 DEG C/relative humidity of temperature 60%) MLSE reaches the time of 14%) result, the life-span of wave recording A is about 10 years, and the life-span of wave recording B is about 24 years, The life-span of wave recording E is about 66 years.Therefore, it is known that by utilizing the determination method of this wave recording, it is possible to make record believe Number long lifetime.According to result above, it is possible to confirm that the determination suppressing the wave recording of the deterioration of tracer signal is to pass through Measure the edge wave momentum of tracer signal, and so that the mode that edge wave momentum reduces adjusts what wave recording was carried out.

The primary structure of the determination method of above-mentioned wave recording is shown in Figure 13.In step S1301 of Figure 13, set institute The wave recording evaluated, the signal pattern that the regulation regional record at CD specifies.Wave recording is being determined by once adjustment In the case of, it is ready at all times multiple wave recording in step S1301, if the signal pattern that each wave recording record is specified The most permissible.On the other hand, the adjustment of wave recording is being repeated, in the case of retrieving optimal wave recording, as long as in step The signal pattern in S1301 specified 1 wave recording record is the most permissible.In step S1302, reproduce the signal recorded, Level fluctuation amount is calculated according to reproducing signal.Then, in step S1303, the level fluctuation amount calculated is utilized to calculate edge Undulate quantity.In this moment, calculate the edge wave momentum in this wave recording.In step S1304, according to the ruffling calculated Amount, determines the wave recording used in record.By once adjust determine wave recording time, accurate in step S1301 Standby multiple wave recording, the edge wave momentum of the most each wave recording, and by wave recording minimum for edge wave momentum It is defined as optimal wave recording, terminates the determination (S1305) of wave recording.On the other hand, repeat adjust wave recording and Retrieval best titime waveform time, transfer to step S1301 at least one times from step S1304, from the most different wave recordings In again calculate edge wave momentum.In step S1304, compare the edge wave momentum of this wave recording and the marking wave of first 1 time Edge wave momentum in shape, and the edge wave momentum being repeatedly adjusted until this wave recording becomes suitable undulate quantity.Now, exist The edge wave momentum of this wave recording becomes the suitable moment, terminates the determination (S1305) of wave recording.Additionally, the most true When having determined the threshold value of edge wave momentum, even if the wave recording set in step S1301 is as 1, this note in step S1304 In the case of the edge wave momentum of record waveform is also below threshold value, terminate the determination (S1305) of wave recording.Above step is this The main composition of the step of the determination method of the wave recording of invention.

According to the step of Figure 13, by the determination of actual implementation record waveform.Using aforesaid CD as object, as record Waveform and set aforesaid wave recording A, B, C, D, E, F.Its result, it is thus identified that as aforesaid result, wave recording E, F It is defined as optimal wave recording, it is possible to be appropriately carried out the determination of wave recording.

Here, for the determination method high precision int making wave recording that suppression tracer signal deteriorates, by the step at Figure 13 The step having added accelerated test in Zhou is shown in Figure 14.In the step of Figure 14, edge wave momentum calculating (S1403) it After, it may be judged whether make tracer signal deteriorate (S1404), when deteriorating, implement accelerated test (S1405).Thus, at Figure 13 Step in, the edge wave momentum after just record can only be measured, but, also measure in the step of Figure 14 and evaluate through time bad Edge wave momentum after change.In the step of Figure 14, when the edge wave momentum after utilizing deterioration determines wave recording, After edge wave momentum after measurement just records in step S1403 of the 1st time, it is judged to make tracer signal in step S1404 Deterioration, and in step S1405, implement accelerated test.As the method for accelerated test, there is aforesaid temperature chamber accelerated test, again Existing acceleration by light test etc..So-called reproduction acceleration by light test is to need to utilize persistently to reproduce than the highest reproducing power to record letter Number, and recording film is shone at high temperature, thus promote the accelerated test method of the deterioration of tracer signal.In the method, The most only heat the recording film of CD, therefore, it is possible to apply the stress higher than temperature chamber accelerated test, it is possible to than constant temperature The deterioration of tracer signal is reproduced in the time that groove accelerated test is short.About detailed content, illustrate by embodiment 4.? The tracer signal applied in accelerated test in step S1405, measures edge wave again by step S1402, S1403, S1404 Momentum, judges whether to proceed accelerated test in step S1404.Repeat above-mentioned accelerated test and the meter of edge wave momentum Survey, it is judged that in the case of the deterioration sufficiently of tracer signal, transfer to step S1406 from step S1404, after deterioration Edge wave momentum determine wave recording.About the determination method of wave recording, except only as the edge wave momentum of object It is changed to beyond deterioration after just record, identical with step S1304 of Figure 13.But, evaluate be not limited only to through time bad Edge wave momentum after change, the also situation about gathering way of edge wave momentum, the edge wave momentum after combination just record, warp Time deterioration after edge wave momentum and the situation about being evaluated that gathers way of edge wave momentum.Here, about step The deterioration of the tracer signal in S1404 the most sufficiently judges, according to time of accelerated test, the signal quality of tracer signal, Whether the shake of edge wave momentum, reflectance, percentage modulation, asymmetric, β etc. reach predetermined threshold value, or whether their increments The threshold value reaching predetermined is carried out.

According to the step of Figure 14, the actually determination of implementation record waveform.With aforementioned CD as object, as marking wave Shape, sets aforesaid wave recording A, B, C, D, E, F.Temperature chamber accelerated test, accelerated test is implemented under all wave recordings Implement 10⁶(condition identical with Figure 12) is terminated after minute.In step S1406, by the edge wave momentum after deterioration Little wave recording is defined as optimal wave recording.Moment wave recording E and the wave recording of step S1406 will transferred to The change of the edge wave momentum of F is shown in Figure 15.Although understanding the wave recording E after just recording and the edge wave of wave recording F Momentum is same degree, but gathers way difference, is implementing 10⁶Edge wave momentum differences after minute accelerated test is very Greatly.Additionally, wave recording F little for the edge wave momentum after deterioration to be defined as optimal wave recording (S1406), terminate The determination (S1407) of wave recording.In order to confirm with determined by the deterioration of signal of wave recording record whether obtain Suppression, implements the temperature chamber accelerated test identical with Fig. 3 to wave recording F.The results are shown in Figure 16.In order to compare deterioration spy Property, the result of wave recording E is also show at Figure 16.The degradation speed of the tracer signal of the wave recording F note than wave recording E The degradation speed of record signal also wants slow, therefore confirms to be determined for suppressing with higher precision by the step using Figure 14 The wave recording of the deterioration of tracer signal.

The wave recording record determined in the present embodiment or is stored on optical disc apparatus on CD.Especially, In the case of the wave recording that the determination method utilizing this wave recording determines is stored in CD by the manufacturer of CD, light Dish device only can pass through from this disc reading wave recording with regard to energy in the case of the adjustment not implementing above-mentioned wave recording Enough determine optimal wave recording.On the other hand, at CD, not there is the record that the determination method according to this wave recording determines In the case of waveform, by being implemented the determination method of this wave recording by optical disc apparatus, it is possible to determine optimal wave recording.This Time, the storage part of Fig. 9 is also stored with this wave recording.

In the present embodiment, with BDXL^TMIt is illustrated as a example by the CD of standard, but certainly can be to BD, DVD, CD R type and RE type implement.

[embodiment 2]

In the present embodiment, to the feelings changing the signal amplitude used in the calculating of the edge wave momentum of embodiment 1 Condition illustrates.About do not have change part, same as in Example 1, omit the most in the present embodiment.

Signal amplitude for the calculating of edge wave momentum is not limited to the amplitude of the single cycle pattern of 8T signal, such as also The single cycle pattern of the signal length shorter than 8T can be utilized or comprise the longest Chief Signal Boatswain than the modulation code in this CD The pattern of signal.

Such as, when the signal amplitude of the single cycle pattern of 3T signal is used for standardization, it is also possible to pre-recorded 3T The single cycle pattern of signal, measures as ruffling and surely uses pattern.Utilize the single cycle figure of the 3T signal of measured in advance The signal amplitude of case implements the calculating of edge wave momentum.Specifically, by by formula 3 and formula 4 " labelling of regulation is long The signal amplitude of degree " it is changed to the signal amplitude of the single cycle pattern of 3T signal, it is possible to calculate edge wave momentum.

It practice, in the CD of embodiment 1, utilize the signal amplitude of the single cycle pattern of 3T signal, according to Figure 13 Step determine wave recording.Its result, in step S1304, the edge wave momentum of wave recording E and F of Figure 11 is minimum, really Determining these is optimal wave recording.Its result, similarly to Example 1, therefore confirms the single week by utilizing 3T signal Phase pattern also is able to suitably determine the wave recording of the deterioration for suppressing tracer signal.

Different from above-mentioned, the single cycle figure of the 10T signal of the modulating rule such as modulated at the 1-7 that will break in BD The signal amplitude of case is in the case of standardized, and the single cycle pattern of the most pre-recorded 10T signal, as edge wave momentum Mensuration pattern.The calculating of edge wave momentum then utilizes the signal amplitude of the single cycle pattern of the 10T signal of measured in advance Implement.Specifically, by " signal amplitude of the mark lengths of regulation " of formula 3 and formula 4 being changed to the list of 10T signal The signal amplitude of one periodic pattern, calculates edge wave momentum.

It practice, in the CD of embodiment 1, use the signal amplitude of the single cycle pattern of 10T signal, according to Figure 14 Step determine wave recording.Its result, in step S1406, about the edge wave momentum after deterioration, the record of Figure 11 Waveform F is minimum, and wave recording F is defined as optimal wave recording.Its result is same as in Example 1, even if therefore confirming to make With the single cycle pattern of 10T signal, it is also possible to suitably determine the wave recording of deterioration for suppressing tracer signal.

This time it is illustrated as a example by single cycle as recording figure forming, but in the peak signal of the pattern recorded Length with for measure the signal length of signal amplitude consistent in the case of, the pattern recorded is not limited to single cycle.Such as, Even if recording figure forming is random, as long as the signal amplitude of its peak signal length is used for standardization, just it also is able to by surveying The peak swing of the fixed stochastic signal recorded is to measure the signal amplitude of peak signal length.

Here, BDXL^TMThe one of the signal length of standard and the relation of signal amplitude is illustrated in Figure 17.Understand at BDXL^TMMark In accurate signal, time more than 10T signal, signal amplitude is saturated, when less than 10T, along with signal length shortens, and signal amplitude Reducing, when 2T, signal amplitude substantially becomes 0.According to the principle of Fig. 6, carry out standard by the peak swing with step response Change, it is possible to the undulate quantity of correct evaluation mark marginal position, in the calculating of edge wave momentum, the most preferably use signal amplitude Saturated signal length.Especially, in the case of using saturated signal amplitude, under each wave recording, measure signal amplitude Signal length can be different.But, from the viewpoint of determining wave recording, it is possible to use the undersaturated letter of signal amplitude Number.Now, as long as being fixed under each wave recording for measuring the signal length of signal amplitude, and calculated edge wave is compared Momentum.

The method of the present embodiment can apply to later embodiment, can obtain identical effect in embodiments.

[embodiment 3]

In the present embodiment, the noise level measurement method and ruffling changing embodiment 1 is measured surely by the feelings of pattern Condition illustrates.About do not have change part, same as in Example 1, omitted the most in the present embodiment.

The assay method of various noises is not limited to the method using the FFT function of the noise measurement/calculating part in control portion 22, Such as directly can also measure according to the undulate quantity of reproducing signal.Now, noise is as relative to reproduction signal levels The level variation amount (RMS: r.m.s.) of meansigma methods is measured out.

In the method for the present embodiment, the reproducing signal being in non-luminance according to LD measures system noise (Δ V_System).Noise (the Δ V measured when utilizing the non-recorded part reproducing CD_total-1), by the computing of equation 5 below Calculate laser noise and aggregate value (the Δ V of dish noise_LD+Disc)。

[formula 5]

ΔV_LD+Disc=√(V² _total-1-ΔV² _system) formula 5

Here, also measure the average level of the reproducing signal of non-recorded part.

Utilize noise (the Δ V measured when reproducing and recording the region having ruffling measurement surely to use pattern_total-2) and This reproducing signal and the ratio α of the average level of the reproducing signal of non-recorded part, by the computing of equation 6 below, calculate electricity Flat undulate quantity (Δ V_fluc)。

[formula 6]

$\mathrm{\Δ}{V}_{\mathrm{fluc}}=\sqrt{\mathrm{}}(\mathrm{\Δ}{V^2}_{\mathrm{total}-2}-\mathrm{\α\Δ}{V^2}_{\mathrm{LD}+\mathrm{Disc}}-\mathrm{\Δ}{V^2}_{\mathrm{System}})$ Formula 6

During here, comprise the signal length of more than optical resolution in ruffling measures fixed pattern, measured Noise in comprise signal component.Now, according to reproducing signal generate same train of signal overlapped signal waveform, utilize relative to The level variation of the average waveform of overlapped signal waveform measures determines noise (Δ V_total-2).If ruffling measures One of overlapped signal during the single cycle of 8T signal is illustrated in Figure 18 (a).Level fluctuation amount can be measured by above method, and Calculate edge wave momentum.In the method, comprise the noise of level fluctuation amount according to overlapped signal waveform measurement, therefore do not have The optical disc apparatus of FFT function also is able to implement noise level measurement, and utilizes FFT function, for not removing the list of signal component Beyond one periodic pattern, it is also possible to carry out noise level measurement.

Further, the fixed single cycle using optical resolution signal below length with pattern is being measured as ruffling In the case of pattern, ruffling will not be produced completely and measure surely with the signal component of pattern.Therefore, there is no need to level fluctuation amount Signal component in calculating go division operation, it is possible to easily measure edge wave momentum.Surely pattern is used being measured by this ruffling It also is able in the case of being applied to embodiment 1 obtain identical effect, therefore, it is possible to make the mensuration transfiguration of edge wave momentum easy.

It practice, in the CD of embodiment 1, according to the step of Figure 13, carried out noise level measurement based on the present embodiment The determination of wave recording.Here, measure surely with pattern as ruffling, employ BDXL^TMIn 2T signal (less than optics Resolution) single cycle pattern.The overlapped signal waveform that reproducing signal according to the ruffling fixed pattern of measurement generates shows In Figure 18 (b).BDXL^TM2T signal less than optical resolution, therefore, it is possible to confirm not comprise signal in overlapped signal waveform Composition.Therefore, do not carry out the generation of overlapped signal waveform, directly calculate noise delta according to the average waveform of reproducing signal V_total-2.Each wave recording is calculated the result of edge wave momentum, in step S1304, the limit of wave recording E and F of Figure 11 Edge undulate quantity is minimum, and they are confirmed as optimal wave recording.Its result is same as in Example 1, therefore confirms by inciting somebody to action The single cycle pattern of the signal length below the noise level measurement method of the present embodiment and optical resolution is used for edge wave momentum Mensuration pattern, it is also possible to suitably determine the wave recording of deterioration for suppressing tracer signal.

The method of the present embodiment can also be used to later embodiment, it is clear that can obtain same effect in embodiments Really.Additionally, for the noise measured in the present embodiment, in order to distinguish with the noise of embodiment 1, employ V mark.But It is, owing to the V of the present embodiment, the N of embodiment 1 are substantially identical units, so formula 6 and formula 2 are the formulas of equivalence.

[embodiment 4]

In the present embodiment, acceleration is changed in the determination of the wave recording of the step of the Figure 14 employing embodiment 1 The situation of test method illustrates.About do not have change part, due to same as in Example 1, the most in the present embodiment Omitted.

The method of accelerated test is not limited to temperature chamber accelerated test, such as, can also use and use the reproduction light reproducing light to add Speed test.Reproducing acceleration by light test is to utilize to continue reproducing signal the side making tracer signal deteriorate than the highest reproducing power Method.In the method, different from temperature chamber accelerated test, in order to only directly heat recording film, carry out accelerating high than temperature chamber At a temperature of accelerated test.Therefore it is the side of the deterioration that can realize tracer signal within the time shorter than temperature chamber accelerated test Method.

In reproducing acceleration by light test, set, according to the condition of regulation, reproducing power Pr used.Such as, storage is read Reproducing power Pr (1) of this CD in optical disc apparatus or recommendation reproducing power Pr (2) determined with standard, by reproducing power It is set as higher than Pr (1) or Pr (2).Or, read record reproducing power Pr (3) on CD, reproducing power be set as Higher than Pr (3).Here, when reproducing, have make laser instrument carry out situation luminous for DC, overlapping high frequency carries out the situation of luminescence. At enforcement high frequency superposition during luminescence, there is the situation that tracer signal can be made to deteriorate within short time more luminous than DC.To reproduce Power setting must be the highest, more can promote the deterioration of tracer signal, hence in so that the accelerated test short time.But, setting For time too high, there is the deterioration mode of recording film to change or make the situation of material degradation beyond recording film.Therefore, it is used for reproducing light The reproducing power of accelerated test needs to be set in not different from the deterioration mode in temperature chamber accelerated test scopes.? The CD used in the present embodiment is implemented to reproduce the result of acceleration by light test with reproduction speed 2x, reproducing power 2.0mW in advance, Observe the deterioration of the substrate not produced in temperature chamber accelerated test.On the other hand, with reproduction speed 2x, reproducing power 1.7mW implements to reproduce the result of acceleration by light test, the deterioration of substrate does not occur, it is possible to confirm identical with temperature chamber accelerated test The deterioration of tracer signal.Additionally, in the present embodiment, it is set as reproducing acceleration by light examination by reproduction speed 2x, reproducing power 1.7mW The acceleration environment tested.During here, too early or too late deterioration occurs under set acceleration environment, as long as change acceleration environment is i.e. Can.

Such as, the reproductions of regulation, recovery time is utilized to manage the reproduction acceleration by light test in step S1405 of Figure 14 Time.In the present embodiment, it is managed with the time, if each accelerated test is about 8.3 minutes (if being scaled occurrence again Number, then be 5873 minor ticks).Additionally, the accelerated test in step S1404 continues and the most such as according to the edge of reproducing signal Whether undulate quantity, signal quality, L-SEAT jitter, L-SEAT shift, β, Asymmetry etc. reach the threshold value of regulation, or Whether person reaches the variable quantity of regulation judges.In the present embodiment, 2% and L-SEAT whether is reached according to the variable quantity of β Whether the variable quantity of jitter reaches 5% judges.

Actually in the CD of embodiment 1, according to the step of Figure 14, utilize in step S1405 and reproduce acceleration by light examination Test and determine wave recording.As an example of deterioration based on the tracer signal reproducing acceleration by light test, Figure 19 illustrates wave recording C The change of L-SEAT jitter and β of tracer signal.In the tracer signal of wave recording C, reproducing acceleration by light test Accumulated time reaches the moment of 50 minutes, and L-SEAT jitter increases by 7.5%, and β increases by 2.8%, is therefore judged as that accelerated test is tied Bundle.After the tracer signal of all wave recordings is terminated accelerated test, step S1406 compares the limit after deterioration Edge undulate quantity, result edge wave momentum is minimum under the wave recording F of Figure 11, and wave recording F is confirmed as optimal marking wave Shape.This result is same as in Example 1, therefore confirms also to be able to suitably determine for suppressing even with reproduction acceleration by light test The wave recording of the deterioration of tracer signal.Here, have selected the wave recording that edge wave momentum is minimum, but can also select to add The wave recording of the increments minimum of the edge wave momentum after speed test.

The method of the present embodiment can also apply to latter embodiments, can obtain identical effect in embodiments Really.

[embodiment 5]

In the present embodiment, the situation of the computational methods of the edge wave momentum changed in embodiment 1 is illustrated.By Same as in Example 1, so being omitted in the present embodiment in the part not having change.

The computational methods of edge wave momentum are not limited to use the formula 3 of embodiment 1, the computational methods of formula 4.Such as, also The computing that can utilize equation 7 below i.e. measures the noise in the level direction of the reproducing signal of pattern, calculates edge wave momentum.

[formula 7]

(edge wave momentum)=(reproduce ruffling and measure noise when determining pattern)/(amplitude of the mark lengths of regulation) formula 7

In the method, it is not necessary to measure and separate various noise to calculate level fluctuation amount, therefore, it is possible to easily implement The mensuration of edge wave momentum.Here, in reproducing the noise that ruffling measures when determining pattern, certainly comprise system noise, swash Optical noise, dish noise.But, in the CD that can arrange level fluctuation amount, or the comparison of the wave recording in same CD In, even if using the edge wave momentum of formula 7 also to be able to the deterioration ground wave recording suitably determined for suppressing tracer signal. Especially, this method is for also being able to provide for suppressing tracer signal not used for the CD of the function separating various noises The assay method of edge wave momentum of determination method of wave recording of deterioration.

Actually in the CD of embodiment 1, compared with Example 1, the computational methods only changing edge wave momentum are come really Determine wave recording.Its result, in step S1304, the edge wave momentum of wave recording E and F of Figure 11 is minimum, and they are determined For best titime waveform.Its result is same as in Example 1, therefore confirms the calculating of edge wave momentum by using formula 7 Method, it is also possible to suitably determine the wave recording of deterioration for suppressing tracer signal.

As the computational methods of edge wave momentum unlike those described above, also have and use the Time Wave disclosed in patent documentation 4 The method of momentum.Now, edge wave momentum is calculated by the computing of equation 8 below.

[formula 8]

(edge wave momentum)=(time fluctuation)/(clock-unit)/(amplitude of maximum mark length) formula 8

Here, Time Wave momentum is that ruffling measurement is surely with the fluctuation of the time-axis direction in the overlapped signal of pattern Amount.The method as described above, can be applicable to the wave recording in the CD that can arrange level fluctuation amount or in same CD Comparison.Additionally, this method can also be used for measuring in the device of the Time Wave momentum such as TIA.

It practice, in the CD of embodiment 1, the most only the computational methods of change edge wave momentum are come really Determine wave recording.Its result, in step S1304, the edge wave momentum of wave recording E and F of Figure 11 is minimum, and they are determined For best titime waveform.Its result is same as in Example 1, therefore confirms the calculating of the edge wave momentum even with formula 8 Method, it is also possible to suitably determine the wave recording of deterioration for suppressing tracer signal.

The method of the present embodiment can also apply to latter embodiments, can obtain identical effect in embodiments Really.

[embodiment 6]

In the present embodiment, the situation of the determination method of the wave recording changed in embodiment 1 is illustrated.Due to The part not having change is same as in Example 1, so being omitted in the present embodiment.

The determination method of the wave recording in step S1304 of Figure 13 and step S1406 of Figure 14 is not limited to according only to limit Edge undulate quantity determines the method for wave recording, in the case of the wave recording that edge wave momentum is minimum determines the most uniquely, also Other evaluation indexes can be used or be combined to determine wave recording.

Such as, in the evaluation index in the determination of wave recording, it is possible to use S/N, i-MLSE, L-SEAT Shift, L-SEAT jitter etc..To edge undulate quantity and SNR when changing recording power in the wave recording E of Figure 11 The result that change is measured is shown in Figure 20.Understand in the region that recording power is 95%～105%, edge wave momentum generally Fixed, it is difficult to determine wave recording according to the minima of edge wave momentum.Now, in addition to edge wave momentum, by combining it His evaluation index, determines optimal wave recording.Such as, in the case of using SNR as other evaluation indexes, as long as on limit Edge undulate quantity little 95%～105% in the range of, record condition the highest for SNR is defined as optimal record condition.This Time, optimal wave recording is confirmed as Pw105%.If wave recording determined by is wave recording E ', to using wave recording E ' The signal of record is implemented the result of temperature chamber accelerated test and is shown in Figure 21.In figure 21, further it is shown that utilize the record in Figure 11 The degradation characteristic of the signal of waveform E record.Understanding compared with wave recording E, the SNR of the tracer signal of wave recording E ' is higher, The most initial i-MLSE declines.On the other hand, it is thus identified that owing to degradation characteristic is equal, so passing through group on edge wave momentum Close other evaluation indexes so that the further high precision int of determination of wave recording.

Use SNR is as other evaluation indexes in the present embodiment, but can also use L-SEAT shift, L-SEAT The indexs such as jitter, i-MLSE.As long as evaluation index carries out selecting according to the characteristic of medium.

The method of the present embodiment is applicable to later embodiment, can obtain identical effect in embodiments.

[embodiment 7]

In the present embodiment, the method illustrating to determine wave recording according to the information of record in CD.

First, the structure utilizing the Figure 22 CD to using in the present embodiment illustrates.CD 100 has number of users According to region 101 and management region 102.DI (Disc Information) 103, defect management information is there is in management region 102 104, the regions such as region 105 are write in examination, especially have recorded, at DI103, the information that this CD is intrinsic.This CD 100 with in embodiment 1 The CD of middle use is identical, on DI103, in addition to the identification information etc. of this CD 101, also remembers as recommendation record waveform Record the information involved by wave recording F of Figure 11.The details of DI103 are summarized in Figure 23.The identification information of CD 101 Etc. being mainly stored in medium intrinsic information, the information involved by wave recording F, as the parameter value for setting wave recording Record is in recording power information and recording impulse information.

This CD is utilized actually to determine recording power in optical disc apparatus.The optical disc apparatus used in the present embodiment with Embodiment 1 is identical, therefore omits the description.

First, optical disc apparatus reproduces the management region of CD, obtains DI information etc..According to acquired information, confirming should The kind of CD, record reproducing condition, be adjusted to the condition meeting this CD by optical disc apparatus.Then, optical disc apparatus is according to institute The information obtained generates recommendation record waveform, and recommendation record waveform is defined as the wave recording for record.Now, in order to repair The sensitivity variations etc. of positive CD, optical disc apparatus existence carries out OPC etc., adjusts the situation of wave recording.More than terminate marking wave The determination of shape in the case of recording, transfers to operation of recording.Wave recording determined above is the marking wave in Figure 11 Shape F, therefore, it is possible to record is difficult to the signal deteriorated as shown in figure 16.It is thus identified that can by said method determine for The tracer signal of the deterioration of suppression tracer signal.

In above-mentioned, achieve wave recording from CD, but the most do not record the note in view of deterioration In the case of record waveform, as long as being determined wave recording by optical disc apparatus similarly to Example 1.Now, if by optical disc apparatus The wave recording generated recorded in CD, or stores in optical disc apparatus, when carrying out the record of this CD the most next time, and energy The wave recording of enough deteriorations determined by the step of the present embodiment for suppressing tracer signal.Additionally, store at optical disc apparatus In the case of having in view of the wave recording of deterioration, use the wave recording read from optical disc apparatus.

[embodiment 8]

In the present embodiment, the method utilizing edge wave momentum that the record performance of CD is evaluated and is sorted is carried out Explanation.This is equivalent to the CD method for separating of media manufacturer.

For being typically common by each of CD class, each layer to the wave recording of video disc recording, its information is remembered Record in the DI in the management region of CD.But, owing to there is manufacture deviation on CD, therefore exist by being provided by DI Wave recording cannot realize the situation of the record of enough qualities.Therefore, the record performance of each CD of media manufacturer needs assessment, And sort.

In the present embodiment, 10 (CD 1～10) CDs with the structure identical with Figure 22 and characteristic are prepared, to it The evaluation of implementation record performance and sorting.The optical disc apparatus used in the present embodiment is same as in Example 1, therefore omits Bright.Additionally, in the present embodiment, if the wave recording E of Figure 11 is the common wave recording for record.

First, utilize wave recording E that each CD is carried out record, calculate edge wave momentum.About ruffling gauge The detailed step calculated, identical with the step of step S1301 of Figure 13 of embodiment 1～S1303, so detailed.Institute The edge wave momentum of each CD calculated is summarized in Figure 24.Also show the limit of the wave recording E utilized in Figure 15 in fig. 24 The result in the increase property calculation life-span of edge undulate quantity.Understand each CD because of deviation the life-span different.Then, according to each CD Life-span sorts.In the present embodiment, it is therefore intended that sub-electing can be at standard maintaining requirement (25 DEG C/relative humidity of temperature 60%) the keeping CD of 50 years under.Therefore, if sorting the life-span that benchmark is more than 50 years.Its result, it is judged that for CD 1 and 9 For bad, remaining 8 good.As can be seen from Figure 24 good 8 CD of above sorting can take care of more than 50 years.Therefore, Confirm the evaluation by above-mentioned record performance and the method for separating of CD, it is possible to be appropriately carried out corresponding with the life-span arbitrarily certainly The sorting of CD.

Claims (15)

1. an information recording method, it is characterised in that including:

By there being the medium of the recording figure forming of the regulation of the wave recording employing regulation to reproduce to record, obtain reproduction The step of signal；

According to above-mentioned reproducing signal, calculating the step of edge wave momentum, this edge wave momentum is for evaluation mark marginal position The index of undulate quantity, be by the index of the undulate quantity quantification of marker edge position；

According to above-mentioned edge wave momentum, determine the step of wave recording；And

Utilize above-mentioned wave recording, above-mentioned medium record the step of information,

The step calculating above-mentioned edge wave momentum includes:

According to above-mentioned reproducing signal, measure the step of the level fluctuation amount comprising noise produced by the fluctuation of marker edge position Suddenly；And

Above-mentioned level fluctuation amount is divided by the step of the signal amplitude of regulation.

2. an information recording method, it is characterised in that including:

By there being the medium of the recording figure forming of the regulation of the wave recording employing regulation to reproduce to record, obtain reproduction The step of signal；

According to above-mentioned reproducing signal, calculating the step of edge wave momentum, this edge wave momentum is for evaluation mark marginal position The index of undulate quantity, be by the index of the undulate quantity quantification of marker edge position；

According to above-mentioned edge wave momentum, determine the step of wave recording；And

Utilize above-mentioned wave recording, above-mentioned medium record the step of information,

The step calculating above-mentioned edge wave momentum includes:

According to above-mentioned reproducing signal, calculate the step of the level fluctuation amount comprising noise produced by the fluctuation of marker edge position Suddenly；And

In the superior mark lengths with above-mentioned recording figure forming of above-mentioned level fluctuation amount, further divided by the step of signal amplitude of regulation Suddenly.

Information recording method the most according to claim 1 and 2, it is characterised in that

Above-mentioned level fluctuation amount is that noise-removal system noise, laser noise and the dish in the level direction from above-mentioned reproducing signal are made an uproar Noise after sound.

4. an information recording method, it is characterised in that including:

By there being the medium of the recording figure forming of the regulation of the wave recording employing regulation to reproduce to record, obtain reproduction The step of signal；

According to above-mentioned reproducing signal, calculating the step of edge wave momentum, this edge wave momentum is for evaluation mark marginal position The index of undulate quantity, be by the index of the undulate quantity quantification of marker edge position；

According to above-mentioned edge wave momentum, determine the step of wave recording；And

Utilize above-mentioned wave recording, above-mentioned medium record the step of information,

Computationally stating in the step of edge wave momentum, above-mentioned edge wave momentum is that the noise of above-mentioned reproducing signal is divided by regulation Signal amplitude and obtain.

5. an information recording method, it is characterised in that including:

By there being the medium of the recording figure forming of the regulation of the wave recording employing regulation to reproduce to record, obtain reproduction The step of signal；

According to above-mentioned reproducing signal, calculating the step of edge wave momentum, this edge wave momentum is for evaluation mark marginal position The index of undulate quantity, be by the index of the undulate quantity quantification of marker edge position；

According to above-mentioned edge wave momentum, determine the step of wave recording；And

Utilize above-mentioned wave recording, above-mentioned medium record the step of information,

The step calculating above-mentioned edge wave momentum includes:

Measure the step of the Time Wave momentum of the time orientation of above-mentioned reproducing signal；And

Above-mentioned Time Wave momentum is divided by clock-unit, further divided by the signal amplitude of maximum mark length of above-mentioned recording figure forming Step.

6. according to the information recording method according to any one of claim 1,2,4,5, it is characterised in that

Above-mentioned recording figure forming is the single cycle pattern of the recording mark of the signal length that signal amplitude is saturated.

7. according to the information recording method according to any one of claim 1,2,4,5, it is characterised in that

Above-mentioned recording figure forming is the single cycle pattern of the recording mark of the signal length less than optical resolution.

8. an information recording method, it is characterised in that including:

By there being the medium of the recording figure forming of the regulation of the wave recording employing regulation to reproduce to record, obtain reproduction The step of signal；

According to above-mentioned reproducing signal, calculating the step of edge wave momentum, this edge wave momentum is for evaluation mark marginal position The index of undulate quantity, be by the index of the undulate quantity quantification of marker edge position；

According to above-mentioned edge wave momentum, determine the step of wave recording；And

Utilize above-mentioned wave recording, above-mentioned medium record the step of information,

Above-mentioned recording figure forming includes the recording mark of the signal length of more than optical resolution, computationally states edge wave momentum In step, generate the overlapped signal waveform of same train of signal according to above-mentioned reproducing signal, according to above-mentioned overlapped signal waveshape Level variation amount, utilizes above-mentioned level variation gauge to count in stating edge wave momentum.

Information recording method the most according to claim 1 and 2, it is characterised in that

Above-mentioned recording figure forming is the single cycle pattern of the recording mark of the signal length less than optical resolution, will reproduce The signal stating single cycle pattern is set to above-mentioned level fluctuation amount.

10. according to the information recording method according to any one of claim 1,2,4,5,8, it is characterised in that

Above-mentioned wave recording is determined so that above-mentioned edge wave momentum is minimum.

11. according to the information recording method according to any one of claim 1,2,4,5,8, it is characterised in that

Above-mentioned wave recording is determined so that above-mentioned edge wave momentum is below threshold value.

12. according to the information recording method according to any one of claim 1,2,4,5,8, it is characterised in that

Above-mentioned wave recording is confirmed as so that above-mentioned edge wave momentum is below threshold value, and meets above-mentioned reproducing signal Other evaluation indexes.

13. according to the information recording method according to any one of claim 1,2,4,5,8, it is characterised in that this information record Method includes:

Recording figure forming to above-mentioned regulation implements the step of accelerated test；And

Calculate the step of the above-mentioned edge wave momentum of the above-mentioned reproducing signal after above-mentioned accelerated test.

14. 1 kinds of information record carriers, it is characterised in that including:

Light source；

The mechanism of the light from above-mentioned light source is irradiated to information recording carrier；And

According to the parameter of the wave recording that edge wave momentum based on recording mark determines, generate and shine to above-mentioned information recording carrier The mechanism of the wave recording of the light penetrated,

Above-mentioned edge wave momentum is the index of the undulate quantity for evaluation mark marginal position, is by the fluctuation of marker edge position The index of amount quantification,

Above-mentioned edge wave momentum is by the calculating in the information recording method according to any one of claim 1,2,4,5,8 State the step of edge wave momentum and obtain.

15. 1 kinds of medium evaluation methods, it is characterised in that including:

The medium having the recording figure forming of the regulation of the wave recording employing regulation to record reproduces, and measures recording mark The step of edge wave momentum；And

According to above-mentioned edge wave momentum, the step of the record performance of evaluation information record medium,

Above-mentioned edge wave momentum is the index of the undulate quantity for evaluation mark marginal position, is by the fluctuation of marker edge position The index of amount quantification,

Above-mentioned edge wave momentum is by the calculating in the information recording method according to any one of claim 1,2,4,5,8 State the step of edge wave momentum and obtain.